EP1165243B1 - Ultra high pressure liquid jet nozzle - Google Patents
Ultra high pressure liquid jet nozzle Download PDFInfo
- Publication number
- EP1165243B1 EP1165243B1 EP20000904713 EP00904713A EP1165243B1 EP 1165243 B1 EP1165243 B1 EP 1165243B1 EP 20000904713 EP20000904713 EP 20000904713 EP 00904713 A EP00904713 A EP 00904713A EP 1165243 B1 EP1165243 B1 EP 1165243B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle
- opening
- nozzle body
- delivery passage
- passage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/02—Separating plastics from other materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
- B05B1/04—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape in flat form, e.g. fan-like, sheet-like
- B05B1/042—Outlets having two planes of symmetry perpendicular to each other, one of them defining the plane of the jet
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/04—Disintegrating plastics, e.g. by milling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/04—Disintegrating plastics, e.g. by milling
- B29B2017/0424—Specific disintegrating techniques; devices therefor
- B29B2017/0428—Jets of high pressure fluid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/04—Disintegrating plastics, e.g. by milling
- B29B2017/0424—Specific disintegrating techniques; devices therefor
- B29B2017/0428—Jets of high pressure fluid
- B29B2017/0432—Abrasive blasting, i.e. the jets being charged with abrasives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2021/00—Use of unspecified rubbers as moulding material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
- B29K2705/08—Transition metals
- B29K2705/12—Iron
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2030/00—Pneumatic or solid tyres or parts thereof
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Definitions
- the present invention is directed to a method and apparatus for disintegrating material such as rubber, plastic and other polymers.
- This invention is applicable for use in the reclamation of rubber from vehicle tyres, and the invention will be described with respect to this application. It is however to be appreciated that the invention is also applicable for use in other applications such as for cleaning purposes.
- US Patent 5626508 (Rankin et al ) discloses a focusing nozzle for producing a jet and a precisely focused, sustained cohesive jet of a mixture of a fluid and abrasive material, having a long coherence length and a prolonged centreline pressure for obtaining clean, precise, sharp-edged kerfs, cuts and grooves in hard substances.
- US Patent 5785582 discloses a mixing tube for use in a high pressure system for generating high pressure abrasive fluid jets, the mixing tube comprising a first and second piece, each piece having a length that is substantially equal to the length of the mixing tube.
- a longitudinal groove is provided in each piece, which extends from a first end to a second end of each piece. The first and second pieces are coupled together such that the first and second longitudinal grooves meet to form a bore that extends longitudinally through the length of the mixing tube.
- US Patent No 4633623 discloses a sandblasting nozzle comprising an intake device able to produce a flat water jet, having an aperture angle ⁇ in the plane of the jet, within a vacuum chamber, a discharge member having in planes perpendicular to the flat jet, two divergent side walls substantially of aperture ⁇ and, on either side of the flat jet, two convergent walls forming an angle ⁇ , said discharge member forming an integral part of the vacuum chamber, and the angle ⁇ being defined in such a way that within the chamber is produced an adequate vacuum to ensure that the flat jet entrains the abrasive particles introduced by a pipe carrying a mixture of gas and abrasive particles.
- the UHPL jets used in the abovementioned method are delivered from a series of UHPL nozzles. These nozzles are normally used in the cutting of different materials, and the UHPL jet delivered by such nozzles produces a cut within the rubber having a narrow and deep V-shaped section. This is because the UHPL nozzle has a nozzle opening which is circular in shape and which therefore produces a jet having a generally circular cross section.
- the effect of the pressure gradient across the resultant jet is that the maximum pressure is at the centre of the jet cross-section, the pressure decreasing towards the outer periphery of the jet cross-section.
- the abovenoted method seeks to increase the amount of rubber stripped at each pass by using a plurality of nozzles. Although this does increase the amount of rubber when stripped at each pass, nevertheless, the remaining upstanding portions of rubber of the tread portion after each pass is difficult to remove. This is because the remaining upstanding portions of rubber following the initial passes are more flexible and therefore more readily deflected by the UHPL jets. The remaining portions of the rubber when subsequently removed can also be larger than the desired size of 100 microns or less.
- the size of the particulate material produced by the resultant UHPL jet are generally of a greater than desired size.
- the liquid jet may typically be at an ultra high pressure from about 20,000 KPa. Liquid at such ultra high pressures may be used in material reclamation applications.
- the liquid jet may also be at a relatively lower high pressure, typically up to 10,000 KPa. At such pressures, the liquid jet may also be used for cleaning and abrasive cleaning applications.
- the use of a relatively planar liquid jet allows for a wider channel shaped "cut" in the material than would be possible by a conventional nozzle which produces a narrow V-shaped cut in the material.
- the cross section of the jet is generally slot shaped, being wide in one plane and relatively narrow lateral to that one plane.
- the pressure gradient across the width of the jet may be relatively uniform. The jet therefore cuts to a more uniform depth across the jet to produce a relatively flat bottomed channel shaped cut in the material.
- the use of such a relatively planar liquid jet produces a more uniform particle size. The result is that a greater amount of material can be disintegrated at each pass of the nozzle when compared with a standard nozzle.
- the amount of remaining upstanding portions of material after the pass of the nozzles can be substantially reduced or even eliminated.
- planar liquid jet for cleaning and abrasive cleaning applications also provides for more effective and efficient cleaning.
- a planar liquid jet provides a more uniform distribution of the liquid pressure across the liquid jet. More uniform cleaning is therefore achieved along the planar liquid jet.
- a greater distribution of the liquid is provided towards the centre of the liquid jet than towards the periphery thereof. This results in less efficient cleaning.
- the delivery passage passing through the nozzle body may have a uniform lateral cross section at least substantially the same as the shape of the nozzle opening. Therefore, the upstream opening of the delivery passage in the nozzle body may also be slot shaped and may have the same shape as the nozzle opening. In other words, the upstream opening may have an elongate length at least substantially identical to the elongate length of the nozzle opening, and the lateral thickness of the upstream opening may be at least substantially identical with the lateral thickness of the nozzle opening.
- the delivery passage may be substantially defined by a pair of parallel planar walls extending through the nozzle body from the upstream opening to the nozzle opening thereof. The delivery passage according to this possible arrangement may have
- the delivery passage passing through the nozzle body may have a uniform cross-section at least substantially the same as the shape of the nozzle opening in an initial portion of the delivery passage for a predetermined extent immediately upstream of said nozzle opening. Therefore, the delivery passage may be initially substantially defined by a pair of parallel planar walls for said initial portion of the delivery passage. Beyond said initial portion, the planar walls may be inclined relative to each other to provide a wedge shaped portion of the delivery passage. Therefore, according to this preferred embodiment, the lateral thickness of the upstream opening may be greater than the lateral thickness of the nozzle opening.
- the delivery passage according to this preferred embodiment may have the following possible configuration advantageous to the operation of the nozzle: H T ⁇ 2 where:
- the lateral cross-section of the delivery passage may maintain an elongate length at least substantially the same as the elongate length of the nozzle opening from the upstream opening to the nozzle opening.
- the lateral cross-section of the delivery passage may maintain an elongate length at least substantially the same as the elongate length of the nozzle opening for the initial portion or another specified extent of the delivery passage immediately upstream from the nozzle opening.
- the passage may widen such that the elongate length of the upstream opening is greater than the elongate length of the nozzle opening.
- the widening of the delivery passage may be gradual. It is however also envisaged that the widening may be in a step fashion.
- the angle of inclination of the planar wall in the wedge shaped portion of the delivery passage relative to the planar walls immediately upstream from the nozzle opening in the initial portion thereof may be equal to or less than 13°. This inclination angle provides for decreased turbulence or facilitates laminar flow in the liquid flow.
- the nozzle system may further include a supply line for supplying high or ultra high pressure liquid to the nozzle body.
- the supply line may have an inner bore, the lateral cross-section of which may have dimensions greater than or equal to the length and width of the nozzle opening.
- Flow straightening vanes or other flow straightening means may be provided immediately upstream of the nozzle body within the inner bore of the supply line to minimise the turbulence of the liquid flow to the nozzle body.
- a flow insert may for example be located within the inner bore of the supply line.
- the flow insert may have an insert passage extending therethrough.
- the insert passage may have a lateral cross-section having a shape corresponding to the shape of the upstream opening of the nozzle body.
- the insert passage may for example have a slot shaped lateral cross-section where the upstream opening is also slot shaped.
- the insert passage may therefore preferably have the following configuration: L N - 1 ⁇ L N T N - 1 ⁇ T N H N - 1 ⁇ ⁇ 5 T N - 1 L N ⁇ L where:
- the upstream opening of the delivery passage may be at least substantially circular in shape. Therefore, the walls of the delivery passage may incline inwardly in the shape of a flattened cone in a conical portion of the delivery passage towards the slot shape nozzle opening.
- the lateral cross section of the delivery passage immediately upstream from the nozzle opening may have at least substantially the same shape as the nozzle opening for a predetermined extent upstream of the nozzle opening. Therefore, the walls of the liquid delivery passage may be initially planar in an initial portion of the delivery passage for a predetermined extent immediately upstream from the nozzle opening, the wall subsequently expanding outwardly and with an increasing curvature such that the upstream opening of the delivery passage is at least substantially circular in shape.
- This configuration facilitates substantially laminar liquid flow from the supply line to the delivery passage without the need of any flow straightening means.
- the delivery passage referred to above may have the following configuration: H T ⁇ 2 Where:
- H N - H T ⁇ 5 where:
- the nozzle body may be constructed in two sections the nozzle body being "split" in a plane extending through the length of the delivery passage.
- the split may be in a plane which bisects the slot opening.
- This arrangement facilitates the manufacture of the nozzle body as channels defining one side of the delivery passage can be separately machined into a respective section of the nozzle body.
- the two sections thereof can then be assembled together to form the nozzle body, with the delivery passage being formed generally by the channels when brought together.
- the channels may therefore define the walls of the delivery passage including the slot opening thereof.
- at least one spacer element may be located between the two nozzle body sections, the thickness of the at least one spacer element defining the lateral thickness of the slot opening.
- each nozzle body section only the portion of the delivery passage adjacent the upstream opening may be machined into each nozzle body section, the initial slot shaped portion of the delivery passage being defined by means of the at least one spacer element.
- This arrangement allows the lateral thickness of the slot opening to be adjusted. It also facilitates the "reconditioning" of the nozzle body after extended use as the contact and end surfaces of the nozzle sections can be “lapped” as so required when the nozzle body is worn from use.
- each nozzle body section may include a further separate base portion.
- the base portion may be made from a wear resistant material typically a carbide, alumina, sapphire or diamond ceramic compound.
- the respective base portions define the initial slot shaped portion and the nozzle opening for the nozzle body.
- the base portion may further define a "land" extending into and providing a step between the portion of the delivery passage adjacent the upstream opening and the initial slot shaped portion thereof.
- This band which may be typically up to 3mm wide, acts to provide for a smooth transition of the liquid flow through the delivery passage, the flow approximately laminar flow. It has been found that the land forms an area of relatively slow moving liquid adjacent it. The remaining liquid can then flow past this stationary fluid through into the initial portion of the delivery passage.
- the nozzle body is accommodated within a nozzle mount for holding the nozzle body in position.
- the nozzle body is located within a cavity in the nozzle mount which may allow high pressure liquid to circulate around the exterior of the nozzle body.
- a seal may be provided between the downstream end of the nozzle body and an inner face of the nozzle mount. This helps to substantially balance the liquid pressure between the exterior of the nozzle body and the delivery passage therein to minimise the possibility of "bursting" of the nozzle body, particularly when the nozzle body has been made in two separate parts.
- a method of disintegrating material including exposing the material to at least one ultra high pressure liquid jet to thereby disintegrate the material, the jet being provided by a high or ultra high pressure liquid nozzle system of the present invention.
- the delivery passage has a cross-sectional flow area which may be at a minimum at least at the nozzle opening.
- the material may preferably be exposed to a plurality of said liquid jets.
- the material may be rubber from a vehicle tyre, in particular, rubber from the tread portion of the tyre. It is however also envisaged that the method according to the present invention be used on other materials such as plastics and other polymers.
- the use of the method according to the present invention leads to more uniform particle size of the particulate material. This is because of the type of UHPL jet produced by the nozzle according to the present invention and the shape and configuration of the cut produced by that jet in the material. Therefore, in the case of rubber from vehicle tyres a higher quality recycled rubber can be produced, with the particles being relatively uniform and preferably less than 100 microns in size.
- a method of cleaning including exposing an area to be cleaned to a high or ultra high pressure liquid jet, generated by a nozzle system according to the present invention.
- liquid jet has a relatively uniform pressure gradient across the jet, this provides for more efficient cleaning by the jet when compared with conventional conical liquid jets.
- the nozzle according to the present invention can be used for liquid abrasive cleaning applications.
- liquid abrasive cleaning system including:
- planar liquid jet in such an application provides for a greater area coverage in each transit of the cleaning system.
- the mixing chamber may provide an elongate interior cavity for accommodating the liquid jet.
- the supply means may include at least one supply opening provided along at least one side of the elongate cavity through which abrasive material may be supplied. These supply openings may preferably be provided on either side of the cavity to allow the planar liquid jet to be "coated” on either side by this abrasive material. It should be noted that the mixing of the abrasive material with the liquid jet may be substantially on the outer periphery thereof resulting in said coating of the liquid jet by the abrasive material.
- Typical abrasive materials that could be used include "garnet” sand alumina powder or any other similar cutting mediums.
- the abrasive material may be drawn into the mixing chamber by virtue of a "Venturi” effect arising from the passage of the liquid jet through the mixing chamber.
- the focusing conduit may have a focusing passage passing therethrough, the liquid jet mixed with abrasive material being directed through the focusing passage to the area to be cleaned.
- the focusing passage may therefore have a slot shaped lateral cross-section to accommodate the planar liquid jet.
- the focusing conduit may be dimensioned as a function of the lateral thickness of the nozzle opening of the nozzle body to optimise the efficiency of the operation of the focusing conduit.
- the focusing conduit may have the followingconfiguration: F T ⁇ 3 L F T ⁇ 100 where:
- High pressure liquid has a pressure of up to 20,000 KPa.
- Ultra high pressure liquid will have pressure greater than 20,000 KPa. It should however be noted that the invention is not limited to these pressures and can be used for a wide range of liquid pressures.
- an ultra high pressure liquid (UHPL) nozzle assembly 1 having a nozzle body 3 according to the present invention.
- the nozzle body 3 has a delivery passage 5 passing therethrough which ultra high pressure liquid can pass to a nozzle opening 7 of the nozzle body 3.
- the ultra high pressure liquid is supplied by a supply line 9 having an inner bore 11 through which the ultra high pressure liquid is supplied.
- the nozzle body 3 and supply line 9 are held together by means of a housing 13 with a nozzle mount 15 accommodated within the housing 13, holding the nozzle body 3 in place.
- the configuration of the delivery passage 5 of the nozzle body 3 shown in Figure 1 is more clearly shown in Figures 2a to c and Figure 3 .
- the nozzle opening 7 is slot shaped having a elongate length L and thickness T.
- the delivery passage 5 has an upstream opening 15 which is circular in shape having a diameter D.
- the elongate length L of the nozzle opening 7 is at least substantially equal to the diameter D of the upstream opening 15.
- the nozzle body 3 has a height H N and the delivery passage 5 extends completely through the nozzle body 3 from the upstream opening 15 to the nozzle opening 7.
- the delivery passage 5 has the same cross-section as the shape of the nozzle opening 7.
- the delivery passage 5 therefore includes two parallel planar walls 17 in this section thereof. Between this section and the upstream opening 15 in a conical portion 18 thereof, the walls 19 of the delivery passage 5 diverge outwardly in the shape of a flattened cone and progressively increase in curvature towards the circular upstream opening 15. This conical portion 18 of the delivery passage allows for substantially laminar flow of liquid from the supply line 9 to the delivery passage 3.
- the delivery passage 5 may have the following dimensions as follows:
- Figures 4a and b show an alternative arrangement of a nozzle body 21 according to the present invention.
- the nozzle body 21 also has a delivery passage 23 with a slot shaped nozzle opening 25 at the downstream end of the nozzle body 21.
- the delivery passage 23 retains a uniform cross-section corresponding to the shape of the nozzle opening 25 through the nozzle body 21. Therefore, the upstream opening 27 of the nozzle body 21 is similarly slot shaped as the nozzle opening 25.
- the delivery passage 23 has the following configuration: H N T ⁇ 2 where:
- Flow straightening arrangement vanes may however need to be provided within supply line 9 supplying liquid to the nozzle body 21 in view of the likely increased turbulence of the fluid due to the shape of the upstream opening 27.
- Figures 5a to 5b show a further possible arrangement of a nozzle body 30 according to the present invention.
- the delivery passage 31 of this nozzle body 30 has a slot shaped nozzle opening 32 having an elongate length L and lateral width T as in the previously described arrangements.
- an initial portion 33 of the delivery passage 31 extends for a predetermined extent H immediately upstream of the nozzle opening 32, the initial portion 33 having a generally uniform cross-section least substantially the same shape as the nozzle opening 32.
- the initial portion 33 is therefore substantially defined by a pair of parallel planar walls 35. This initial portion 33 is therefore similar to the initial portion 16 of the arrangement shown in Figures 2a to 3 .
- the delivery passage 31 includes a wedge shaped portion 34 extending from the initial portion 33 thereof, the wedge shaped portion 34 having planar walls 36 inclined relative to the parallel planar walls 35 of the initial portion 33.
- the inclined planar walls 36 extend outwardly from the initial portion 33 to substantially define the wedge shaped portion 34 of the delivery passage 31.
- Each inclined wall 36 may have an inclination angle, preferably equal to or less than 13°, relative to the planar wall 35 of the initial portion 33 to which the inclined wall 36 extends. The abovenoted inclination angle helps to minimise turbulence or facilitate laminar flow in the liquid flow though the delivery passage 31.
- the upstream opening 38 of the nozzle body 30 has a lateral thickness T N greater than the lateral thickness T of the nozzle opening 32.
- the elongate length L N of the upstream opening 38 may be at least substantially equal to the elongate length L of the nozzle opening 32.
- the delivery passage 31 may gradually widen, at least from the initial portion 33 thereof such that the elongate length T N of the upstream opening 38 is greater than the elongate length T of the nozzle opening 32.
- H N is the total length of the delivery passage from the upstream opening to the nozzle opening of the nozzle body.
- Figure 6a is similar to Figure 1 , and corresponding integers are conveniently designated with the same reference numerals.
- the main difference is that the nozzle assembly 1 is shown with the nozzle body 30 of Figures 5a to c.
- This nozzle body 30 has a generally slot shaped upstream opening 38, while the inner bore 11 of the supply line 9 supplying ultra high pressure liquid to the upstream opening 38 is typically circular in cross-section. This will result in substantial turbulence being generated within the fluid immediately upstream of the nozzle body 30 resulting in a loss in fluid pressure. It is therefore advantageous to include means to reduce or eliminate this turbulence.
- a flow inset 39 may be located within the inner bore 11 of the supply line 9 immediately upstream of the nozzle body 30.
- the flow insert 39 has a slot shaped insert passage 41 extending therethrough.
- the use of such an insert 39 will help to smooth the fluid flow to the upstream opening 38 of the nozzle body 30. It is to be appreciated that such a flow insert 39 could also be used for, for example, the nozzle body 21 of Figures 4a and b.
- the insert passage 41 may have the following configuration: L N - 1 ⁇ LN T N - 1 ⁇ TN H N - 1 ⁇ ⁇ 5 T N - 1 where:
- a nozzle body 50 according to yet another alternative arrangement according to the present invention.
- the nozzle body 50 is formed in two nozzle body sections 51, the "split"of the nozzle body 50 being in a plane extending through the length of the delivery passage 54 and bisecting the slot opening (not shown) of the nozzle body 50.
- a channel 53 In each nozzle body section 51 there is provided a channel 53. When the nozzle section 51 are assembled together, the channels 53 together form at least part of the delivery passage 54 of the nozzle body 50.
- the delivery passage 54 is similar in shape to the embodiment shown in Figures 5a to 5c in having a wedge shape portion adjacent the upstream opening of the nozzle body 50.
- One or more spacer element 62 are provided between each nozzle body section 51, the nozzle body section 51 being secured together by fastening members 52.
- the thickness of the spacer element (s) 62 determines the lateral thickness of the slot opening of the nozzle body 50. This arrangement therefore allows for the lateral thickness of the slot opening to be adjusted by using spacer elements of different thickness or sandwiching more than one spacer element at a time between the nozzle body sections 51.
- At least one spacer element 62 can be provided between the nozzle body section 51. Alternatively, more than one spacer element 62 can be located between the nozzle body section 51 as required.
- the nozzle body 50 is supported in a nozzle mount 55 such as that shown in Figures 8a and 8b .
- This nozzle mount 55 includes a cavity 56 in which the nozzle body 50 can be placed.
- the cavity 56 has an inner face 59 in which is provided a slot opening 58.
- This nozzle mount slot opening 58 is aligned with the slot opening of the nozzle opening 50 when supported therein.
- An "O" ring 57 is located between a lower end face 60 of the nozzle body 50 and the inner face 59 of the nozzle mount cavity 56.
- This arrangement allows high pressure liquid to circulate around the nozzle body 50, with the end face 60 pressed against the inner face 59. This ensures that the only high pressure liquid passing through the nozzle opening 58 of the nozzle mount 55 is from the delivery passage 54 of the nozzle body 50. High pressure liquid is prevented from entering the nozzle mount slot opening 58 from the area surrounding the nozzle body 50.
- This arrangement helps to substantially balance the liquid pressure between the exterior of the nozzle body 50 and the delivery passage 54 thereof to minimise thepossibility of the "bursting"of the nozzle body 50 that could occur if there is a substantial difference between the pressure within the delivery passage 54 and the exterior of the nozzle body 50.
- the nozzle body arrangement shown in Figure 7a and 7b is relatively straight forward to manufacture because the delivery passage 54 is in part provided by channels 53 machined in the contact face 61 of each nozzle section 51. Furthermore, the nozzle body 50 can be readily “reconditioned” after extended use where there has been wear of the nozzle opening thereof, by "lapping" the contact face 61 and end face 60 of each nozzle body section 51.
- the nozzle body 3, 21, 30, 50 according to the present invention provides a relatively planar UHPL jet which results in a relatively wide channel shaped cut in the material exposed to such a jet.
- the resultant particulate material produced by the jet in the case of tread rubber is relatively uniform in size, preferably less than 100 microns in size.
- each nozzle body section 71 includes a base portion 72 formed of wear-resistant material such as sapphire or diamond ceramic compounds.
- the base portion 72 when the nozzle body 70 is assembled defines the initial slotted shaped portions of the delivery passage 73.
- the rest of the nozzle body section 71 provide the wedge shaped portion 74 defined by inclined walls 75 provided in each nozzle body section 71.
- the use of wear-resistant base portion 72 help to improve the long term accuracy and reliability of the nozzle body 70.
- a "land 76" with the base portion 72 for each nozzle body section 71, this land 76 being provided adjacent the shallow end of the inclined wall 75.
- the land can for example extend in the range of between 0 to 3 mm generally laterally from the end of the inclined wall 75. It has been found that the provision of a land 76 on either side of the initial portion of the delivery passage 73 provides a zone of slow moving liquid immediately adjacent the band 76. This zone acts to direct the remaining liquid through the delivery passage 73 to provide a smooth transition to the flow to the slot shaped portion of the delivery passage 73. The result is a fluid flow which approximates laminar flow.
- the nozzle system according to the present application with respect to reclamation applications where pressures from 5000 to 30,000 KPa can be used. It should be noted that the nozzle according to the present invention also be used for cleaning applications. The nozzle can be used directed to provide a planar liquid jet for cleaning. In such applications, the liquid pressure can be up to 20,000 KPa.
- the nozzle system according to the present invention in liquid abrasive cleaning applications as part of a system 80 as shown in Figures 11a and 11b .
- the liquid abrasive cleaning system 80 includes the nozzle body 70 as shown in Figures 10a and 10b . It should be noted that other nozzle body embodiments could also be used in the applications.
- the system 80 further includes a mixing chamber 81 having an elongate interior cavity 83. As elongate inlet opening 82 is provided along the length of the cavity 83, this inlet opening 82 being aligned with the slot shaped nozzle opening 77 of the nozzle body 70.
- Supply openings 84 for supplying abrasive material to the cavity 83 are also provided along either side thereof.
- a focusing conduit 85 extends from the mixing chamber 81 and directs the liquid jet when mixed with abrasive material through to the area to be cleaned.
- the focussing conduit 85 can have a focusing passage 86 with a slot shaped lateral cross-section to accommodate the planar liquid jet.
- the liquid jet from the nozzle body 70 passes through the cavity 83 of the mixing chamber 81.
- Abrasive material such as garnet sand or alumina powder are supplied through the supply openings 84, this material being drawn into the cavity 83 by the Venturi effect arising from the passage of the liquid jet through the mixing chamber 83.
- the abrasive material therefore "coats" the liquid jet when passing through the mixing chamber.
- the focusing conduit 85 then acts to direct the liquid jet to the area to be abrasively cleaned.
- the liquid pressure supplied to the nozzle body 70 can be in the order of between 10,000 to 20,000 KPa. This range falls between the pressure range used for cutting applications, and the pressure range used for direct liquid cleaning by the nozzle according to the present invention. It should however be noted that the invention is not necessarily restricted to use within these ranges for each application.
- the delivery passage is defined by parallel planar walls. It is however also envisaged that the delivery passage may be defined by inclined planar or curved walls extending all the way from the upstream opening to the nozzle opening of the nozzle body with no parallel portions thereof. The delivery passage would therefore be wedged shaped or a flattened cone shape without any initial parallel portion. Furthermore, in the abovedescribed arrangements, the nozzle opening is shown flush with the end face of the nozzle body.
- the nozzle opening be provided by a "throat" within the delivery passage, the throat being recessed inwardly from the end face of the nozzle body.
- the delivery passage can therefore narrow progressively to the throat providing the nozzle opening, and may then expand outwardly again in a similar fashion to a Venturi.
- the throat will still however retain the slot shape according to the present invention.
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- Engineering & Computer Science (AREA)
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- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Disintegrating Or Milling (AREA)
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Abstract
Description
- The present invention is directed to a method and apparatus for disintegrating material such as rubber, plastic and other polymers. This invention is applicable for use in the reclamation of rubber from vehicle tyres, and the invention will be described with respect to this application. It is however to be appreciated that the invention is also applicable for use in other applications such as for cleaning purposes.
- The disposal of used vehicle tyres is a growing environmental problem because of the increasing number of vehicles in the world. The traditional methods of disposal, being to use the tyres in landfill or to burn the tyres, do have detrimental effects on the environment. The alternative is to recycle the various parts of the tyres. To this end, there have been ongoing developments of methods to recycle the used tyres to enable the rubber in the tyres to be recycled for other purposes. It would ideally be preferable for economic reasons to use the recycled rubber to produce new tyres. In practice, there has been only limited application of the recycled rubber making it generally uneconomical to conduct large scale recycling of tyres. One reason why this is the situation is that the quality of the recycled rubber obtained from known methods is variable or poor, being mixed with inferior quality rubber and/or other waste products, making it unsuitable for new tyre productions. Also, it is generally necessary to devulcanise the recycled rubber prior to its use in tyre production.
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US Patent 5626508 (Rankin et al ) discloses a focusing nozzle for producing a jet and a precisely focused, sustained cohesive jet of a mixture of a fluid and abrasive material, having a long coherence length and a prolonged centreline pressure for obtaining clean, precise, sharp-edged kerfs, cuts and grooves in hard substances. -
US Patent 5785582 (Stefanik et al ) discloses a mixing tube for use in a high pressure system for generating high pressure abrasive fluid jets, the mixing tube comprising a first and second piece, each piece having a length that is substantially equal to the length of the mixing tube. A longitudinal groove is provided in each piece, which extends from a first end to a second end of each piece. The first and second pieces are coupled together such that the first and second longitudinal grooves meet to form a bore that extends longitudinally through the length of the mixing tube. -
US Patent No 4633623 (Spitz ) discloses a sandblasting nozzle comprising an intake device able to produce a flat water jet, having an aperture angle α in the plane of the jet, within a vacuum chamber, a discharge member having in planes perpendicular to the flat jet, two divergent side walls substantially of aperture α and, on either side of the flat jet, two convergent walls forming an angle β, said discharge member forming an integral part of the vacuum chamber, and the angle β being defined in such a way that within the chamber is produced an adequate vacuum to ensure that the flat jet entrains the abrasive particles introduced by a pipe carrying a mixture of gas and abrasive particles. - In
US Patent 5482215 (Veres ), there is described a method of reclaiming rubber using ultra high pressure liquid jets to disintegrate the rubber on the tread portion of the tyre. It should be noted that three different grades of rubber are normally used in the manufacture of tyres, the highest grade rubber being used in the tread portion of the tyre, the poorer grades being on the sidewalls and inner surfaces of the tyre. The described method therefore strips the rubber from the tread portion to provide higher quality recycled rubber. The main advantage of using ultra high pressure liquid (UHPL) jets is that it can disintegrate the rubber into a particulate form which does not then need to be devulcanised and can therefore be directly reused. It is preferable for this reason for the particle size to be less than 100 microns in size. - The UHPL jets used in the abovementioned method are delivered from a series of UHPL nozzles. These nozzles are normally used in the cutting of different materials, and the UHPL jet delivered by such nozzles produces a cut within the rubber having a narrow and deep V-shaped section. This is because the UHPL nozzle has a nozzle opening which is circular in shape and which therefore produces a jet having a generally circular cross section. The effect of the pressure gradient across the resultant jet is that the maximum pressure is at the centre of the jet cross-section, the pressure decreasing towards the outer periphery of the jet cross-section. Because of the shape of the resultant cut by the UHPL jet, only a small amount of rubber is stripped from the tread portion by the nozzle at each pass of that nozzle. The abovenoted method seeks to increase the amount of rubber stripped at each pass by using a plurality of nozzles. Although this does increase the amount of rubber when stripped at each pass, nevertheless, the remaining upstanding portions of rubber of the tread portion after each pass is difficult to remove. This is because the remaining upstanding portions of rubber following the initial passes are more flexible and therefore more readily deflected by the UHPL jets. The remaining portions of the rubber when subsequently removed can also be larger than the desired size of 100 microns or less.
- Although a greater amount of material can be stripped when the nozzle opening is made larger in size to produce a wider diameter UHPL jet, the size of the particulate material produced by the resultant UHPL jet are generally of a greater than desired size.
- It is therefore an object of the present invention to overcome at least one of the disadvantages of the prior art.
- With this in mind, according to one aspect of the present invention, there is provided a nozzle system according to
claim 1. - The liquid jet may typically be at an ultra high pressure from about 20,000 KPa. Liquid at such ultra high pressures may be used in material reclamation applications. The liquid jet may also be at a relatively lower high pressure, typically up to 10,000 KPa. At such pressures, the liquid jet may also be used for cleaning and abrasive cleaning applications.
- In the use of the nozzle system for reclamation applications, the use of a relatively planar liquid jet allows for a wider channel shaped "cut" in the material than would be possible by a conventional nozzle which produces a narrow V-shaped cut in the material. This is because the cross section of the jet is generally slot shaped, being wide in one plane and relatively narrow lateral to that one plane. Furthermore, the pressure gradient across the width of the jet may be relatively uniform. The jet therefore cuts to a more uniform depth across the jet to produce a relatively flat bottomed channel shaped cut in the material. Furthermore, the use of such a relatively planar liquid jet produces a more uniform particle size. The result is that a greater amount of material can be disintegrated at each pass of the nozzle when compared with a standard nozzle. Furthermore, by having a series of said nozzles set up for operation in a row or other configuration, the amount of remaining upstanding portions of material after the pass of the nozzles can be substantially reduced or even eliminated.
- The use of a planar liquid jet for cleaning and abrasive cleaning applications also provides for more effective and efficient cleaning. Unlike the conical liquid jets currently used for such purposes, a planar liquid jet provides a more uniform distribution of the liquid pressure across the liquid jet. More uniform cleaning is therefore achieved along the planar liquid jet. By comparison, in a conical liquid jet, a greater distribution of the liquid is provided towards the centre of the liquid jet than towards the periphery thereof. This results in less efficient cleaning.
- According to one preferred embodiment according to the present invention, the delivery passage passing through the nozzle body may have a uniform lateral cross section at least substantially the same as the shape of the nozzle opening. Therefore, the upstream opening of the delivery passage in the nozzle body may also be slot shaped and may have the same shape as the nozzle opening. In other words, the upstream opening may have an elongate length at least substantially identical to the elongate length of the nozzle opening, and the lateral thickness of the upstream opening may be at least substantially identical with the lateral thickness of the nozzle opening. The delivery passage may be substantially defined by a pair of parallel planar walls extending through the nozzle body from the upstream opening to the nozzle opening thereof. The delivery passage according to this possible arrangement may have
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- HN is the total length of the delivery passage from the upstream opening to the nozzle opening of the nozzle body; and
- T is the lateral thickness of the nozzle opening.
- According to a further preferred embodiment according to the present invention, the delivery passage passing through the nozzle body may have a uniform cross-section at least substantially the same as the shape of the nozzle opening in an initial portion of the delivery passage for a predetermined extent immediately upstream of said nozzle opening. Therefore, the delivery passage may be initially substantially defined by a pair of parallel planar walls for said initial portion of the delivery passage. Beyond said initial portion, the planar walls may be inclined relative to each other to provide a wedge shaped portion of the delivery passage. Therefore, according to this preferred embodiment, the lateral thickness of the upstream opening may be greater than the lateral thickness of the nozzle opening.
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- H is the length of the initial portion of the delivery passage immediately upstream from the nozzle opening of the nozzle body; and
- T is the lateral thickness of the nozzle opening of the nozzle body.
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- HN is the total length of the delivery passage from the upstream opening to the nozzle opening of the nozzle body.
- The lateral cross-section of the delivery passage may maintain an elongate length at least substantially the same as the elongate length of the nozzle opening from the upstream opening to the nozzle opening. Alternatively, the lateral cross-section of the delivery passage may maintain an elongate length at least substantially the same as the elongate length of the nozzle opening for the initial portion or another specified extent of the delivery passage immediately upstream from the nozzle opening. Beyond said initial portion or specified extent of the delivery passage, the passage may widen such that the elongate length of the upstream opening is greater than the elongate length of the nozzle opening. The widening of the delivery passage may be gradual. It is however also envisaged that the widening may be in a step fashion.
- The angle of inclination of the planar wall in the wedge shaped portion of the delivery passage relative to the planar walls immediately upstream from the nozzle opening in the initial portion thereof may be equal to or less than 13°. This inclination angle provides for decreased turbulence or facilitates laminar flow in the liquid flow.
- The nozzle system may further include a supply line for supplying high or ultra high pressure liquid to the nozzle body. The supply line may have an inner bore, the lateral cross-section of which may have dimensions greater than or equal to the length and width of the nozzle opening. Flow straightening vanes or other flow straightening means may be provided immediately upstream of the nozzle body within the inner bore of the supply line to minimise the turbulence of the liquid flow to the nozzle body.
- A flow insert may for example be located within the inner bore of the supply line. The flow insert may have an insert passage extending therethrough. The insert passage may have a lateral cross-section having a shape corresponding to the shape of the upstream opening of the nozzle body. The insert passage may for example have a slot shaped lateral cross-section where the upstream opening is also slot shaped.
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- LN is the elongate length of the nozzle body upstream opening;
- LN-1 is the elongate length of the lateral cross-section of the insert passage;
- TN is the lateral width of the nozzle body upstream opening; and
- TN-1 is the lateral width of the lateral cross-section of the insert passage.
- According to a further alternative preferred embodiment, the upstream opening of the delivery passage may be at least substantially circular in shape. Therefore, the walls of the delivery passage may incline inwardly in the shape of a flattened cone in a conical portion of the delivery passage towards the slot shape nozzle opening. The lateral cross section of the delivery passage immediately upstream from the nozzle opening may have at least substantially the same shape as the nozzle opening for a predetermined extent upstream of the nozzle opening. Therefore, the walls of the liquid delivery passage may be initially planar in an initial portion of the delivery passage for a predetermined extent immediately upstream from the nozzle opening, the wall subsequently expanding outwardly and with an increasing curvature such that the upstream opening of the delivery passage is at least substantially circular in shape.
- This configuration facilitates substantially laminar liquid flow from the supply line to the delivery passage without the need of any flow straightening means.
-
- H is the length of the initial portion of the delivery passage immediately upstream from the nozzle opening of the nozzle body; and
- T is the lateral thickness of the nozzle opening of the nozzle body.
-
- HN is the total length of the delivery passage from the upstream opening to the nozzle opening of the nozzle body.
- The nozzle body may be constructed in two sections the nozzle body being "split" in a plane extending through the length of the delivery passage. The split may be in a plane which bisects the slot opening. This arrangement facilitates the manufacture of the nozzle body as channels defining one side of the delivery passage can be separately machined into a respective section of the nozzle body. The two sections thereof can then be assembled together to form the nozzle body, with the delivery passage being formed generally by the channels when brought together. The channels may therefore define the walls of the delivery passage including the slot opening thereof. Alternatively, at least one spacer element may be located between the two nozzle body sections, the thickness of the at least one spacer element defining the lateral thickness of the slot opening. Therefore, only the portion of the delivery passage adjacent the upstream opening may be machined into each nozzle body section, the initial slot shaped portion of the delivery passage being defined by means of the at least one spacer element. This arrangement allows the lateral thickness of the slot opening to be adjusted. It also facilitates the "reconditioning" of the nozzle body after extended use as the contact and end surfaces of the nozzle sections can be "lapped" as so required when the nozzle body is worn from use.
- In an alternative related preferred embodiment, each nozzle body section may include a further separate base portion. The base portion may be made from a wear resistant material typically a carbide, alumina, sapphire or diamond ceramic compound. When the two nozzle body sections are brought together, the respective base portions define the initial slot shaped portion and the nozzle opening for the nozzle body. The base portion may further define a "land" extending into and providing a step between the portion of the delivery passage adjacent the upstream opening and the initial slot shaped portion thereof. This band which may be typically up to 3mm wide, acts to provide for a smooth transition of the liquid flow through the delivery passage, the flow approximately laminar flow. It has been found that the land forms an area of relatively slow moving liquid adjacent it. The remaining liquid can then flow past this stationary fluid through into the initial portion of the delivery passage.
- The nozzle body is accommodated within a nozzle mount for holding the nozzle body in position. The nozzle body is located within a cavity in the nozzle mount which may allow high pressure liquid to circulate around the exterior of the nozzle body. A seal may be provided between the downstream end of the nozzle body and an inner face of the nozzle mount. This helps to substantially balance the liquid pressure between the exterior of the nozzle body and the delivery passage therein to minimise the possibility of "bursting" of the nozzle body, particularly when the nozzle body has been made in two separate parts.
- According to another aspect of the present invention, there is provided a method of disintegrating material including exposing the material to at least one ultra high pressure liquid jet to thereby disintegrate the material, the jet being provided by a high or ultra high pressure liquid nozzle system of the present invention.
- The delivery passage has a cross-sectional flow area which may be at a minimum at least at the nozzle opening.
- The material may preferably be exposed to a plurality of said liquid jets.
- The material may be rubber from a vehicle tyre, in particular, rubber from the tread portion of the tyre. It is however also envisaged that the method according to the present invention be used on other materials such as plastics and other polymers.
- The use of the method according to the present invention leads to more uniform particle size of the particulate material. This is because of the type of UHPL jet produced by the nozzle according to the present invention and the shape and configuration of the cut produced by that jet in the material. Therefore, in the case of rubber from vehicle tyres a higher quality recycled rubber can be produced, with the particles being relatively uniform and preferably less than 100 microns in size.
- According to a further aspect of the present invention, there is provided a method of cleaning, including exposing an area to be cleaned to a high or ultra high pressure liquid jet, generated by a nozzle system according to the present invention.
- As the liquid jet has a relatively uniform pressure gradient across the jet, this provides for more efficient cleaning by the jet when compared with conventional conical liquid jets.
- It is also envisaged that the nozzle according to the present invention can be used for liquid abrasive cleaning applications.
- With this in mind, the present invention provides in another aspect a liquid abrasive cleaning system including:
- a nozzle system according to the present invention;
- a mixing chamber located downstream of the nozzle opening through which the liquid jet is directed by the nozzle, the mixing chamber including supply means for supplying an abrasive material to the mixing chamber for mixing with the liquid jet, and
- a focusing conduit extending from the mixing chamber for directing the liquid jet mixed with abrasive material to an area to be cleaned.
- The use of a planar liquid jet in such an application provides for a greater area coverage in each transit of the cleaning system.
- The mixing chamber may provide an elongate interior cavity for accommodating the liquid jet. The supply means may include at least one supply opening provided along at least one side of the elongate cavity through which abrasive material may be supplied. These supply openings may preferably be provided on either side of the cavity to allow the planar liquid jet to be "coated" on either side by this abrasive material. It should be noted that the mixing of the abrasive material with the liquid jet may be substantially on the outer periphery thereof resulting in said coating of the liquid jet by the abrasive material.
- Typical abrasive materials that could be used include "garnet" sand alumina powder or any other similar cutting mediums.
- The abrasive material may be drawn into the mixing chamber by virtue of a "Venturi" effect arising from the passage of the liquid jet through the mixing chamber.
- The focusing conduit may have a focusing passage passing therethrough, the liquid jet mixed with abrasive material being directed through the focusing passage to the area to be cleaned. The focusing passage may therefore have a slot shaped lateral cross-section to accommodate the planar liquid jet.
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- F is the lateral thickness of the focusing passage;
- T is the lateral thickness of the nozzle opening of the nozzle body; and
- L F is the length of the focusing conduit.
- It will be convenient to further describe the present invention with respect to the accompanying drawings which illustrate preferred embodiment of the present invention. Other arrangements of the invention are possible, and consequently, the particularity of the accompanying drawings is not to be understood as superseding the generality of the preceding description of the invention in the drawings:
-
Figure 1 is a sidecross-sectional view of a nozzle assembly according to the present invention; -
Figure 2a is a side cross-sectional view of a first preferred embodiment of a nozzle body according to the present invention; -
Figure 2b is a cross-sectional view along lines AA ofFigure 2a ; -
Figure 2c is a cross-sectional view along lines BB ofFigure 2a ; -
Figure 3 is an isometric view of the internal volume of the delivery passage of the nozzle ofFigure 2a ; -
Figure 4a is a side cross-sectional view of an alternative arrangement of a nozzle body according to the present invention; -
Figure 4b is an end view of the nozzle body ofFigure 4a ; -
Figure 5a is an end view of a further preferred embodiment of a nozzle body according to the present invention; -
Figure 5b is a side cross-sectional view along line AA ofFigure 5a ; -
Figure 5c is a side cross-sectional view along line BB ofFigure 5a ; -
Figure 6a is a side cross-sectional view of a nozzle assembly similar toFigure 1 , but having the nozzle body ofFigure 5a ; -
Figure 6b is a cross-sectional view along line AA ofFigure 6a ; -
Figure 7a is a perspective view of a nozzle body according to yet another alternative preferred embodiment according to the present invention; -
Figure 7b is a perspective view of a nozzle body section of the nozzle body ofFigure 7a ; -
Figure 8a is a perspective view of a nozzle mount for the nozzle body ofFigure 7a ; -
Figure 8b is a plan view of the nozzle mount ofFigure 8a ; -
Figure 9a is a cross-sectional view of a cut made by a conventional UHPL nozzle; -
Figure 9b is a cross-sectional view of a cut made by a UHPL nozzle according to the present invention; -
Figure 10a is a perspective view of a nozzle body according to a further preferred embodiment according to the present invention; -
Figure 10b is a perspective view of a nozzle body section of the nozzle body ofFigure 10a ; -
Figure 11 a is a side cross-sectional view of a liquid abrasive cleaning system according to the present invention; and -
Figure 11 b is a plan cross-sectional view of the liquid abrasive cleaning system ofFigure 11a . - In the following description, a distinction is made between high pressure and ultra high pressure liquid. High pressure liquid has a pressure of up to 20,000 KPa. Ultra high pressure liquid will have pressure greater than 20,000 KPa. It should however be noted that the invention is not limited to these pressures and can be used for a wide range of liquid pressures.
- Referring initially to
Figure 1 , there is shown an ultra high pressure liquid (UHPL)nozzle assembly 1 having anozzle body 3 according to the present invention. Thenozzle body 3 has adelivery passage 5 passing therethrough which ultra high pressure liquid can pass to anozzle opening 7 of thenozzle body 3. - The ultra high pressure liquid is supplied by a
supply line 9 having aninner bore 11 through which the ultra high pressure liquid is supplied. Thenozzle body 3 andsupply line 9 are held together by means of ahousing 13 with anozzle mount 15 accommodated within thehousing 13, holding thenozzle body 3 in place. - The configuration of the
delivery passage 5 of thenozzle body 3 shown inFigure 1 is more clearly shown inFigures 2a to c andFigure 3 . Thenozzle opening 7 is slot shaped having a elongate length L and thickness T. Thedelivery passage 5 has anupstream opening 15 which is circular in shape having a diameter D. In the illustrated arrangement, the elongate length L of thenozzle opening 7 is at least substantially equal to the diameter D of theupstream opening 15. Thenozzle body 3 has a height HN and thedelivery passage 5 extends completely through thenozzle body 3 from theupstream opening 15 to thenozzle opening 7. For a predetermined extent H immediately upstream of thenozzle opening 7 in aninitial portion 16 thereof, thedelivery passage 5 has the same cross-section as the shape of thenozzle opening 7. Thedelivery passage 5 therefore includes two parallelplanar walls 17 in this section thereof. Between this section and theupstream opening 15 in aconical portion 18 thereof, thewalls 19 of thedelivery passage 5 diverge outwardly in the shape of a flattened cone and progressively increase in curvature towards the circularupstream opening 15. Thisconical portion 18 of the delivery passage allows for substantially laminar flow of liquid from thesupply line 9 to thedelivery passage 3. - Experimentation involving this
nozzle body 3 has shown a favourable relationship between the lateral thickness T of thenozzle opening 7 and the elongate extent H upstream from thenozzle opening 7. -
-
- H is the length of the initial portion of the delivery passage immediately upstream from the nozzle opening of the nozzle body;
- HN is the total length of the delivery passage from the upstream opening to the nozzle opening of the nozzle body; and
- T is the lateral thickness of the nozzle opening.
- By way of example only, referring to
Figures 2a to c , thedelivery passage 5 may have the following dimensions as follows: - D=6mm
- H = 13mm
- L = 6mm
- T = 0.16mm
- HN = 35mm
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Figures 4a and b show an alternative arrangement of anozzle body 21 according to the present invention. Thenozzle body 21 also has adelivery passage 23 with a slot shapednozzle opening 25 at the downstream end of thenozzle body 21. However, unlike the previously described arrangement, thedelivery passage 23 retains a uniform cross-section corresponding to the shape of thenozzle opening 25 through thenozzle body 21. Therefore, theupstream opening 27 of thenozzle body 21 is similarly slot shaped as thenozzle opening 25. -
- HN is the total length of the delivery passage from the upstream opening to the nozzle opening of the nozzle body; and
- T is the lateral thickness of the nozzle opening.
- This arrangement is potentially more convenient to manufacture than the earlier described arrangement. Flow straightening arrangement vanes (not shown) may however need to be provided within
supply line 9 supplying liquid to thenozzle body 21 in view of the likely increased turbulence of the fluid due to the shape of theupstream opening 27. -
Figures 5a to 5b show a further possible arrangement of anozzle body 30 according to the present invention. Thedelivery passage 31 of thisnozzle body 30 has a slot shapednozzle opening 32 having an elongate length L and lateral width T as in the previously described arrangements. Furthermore, aninitial portion 33 of thedelivery passage 31 extends for a predetermined extent H immediately upstream of thenozzle opening 32, theinitial portion 33 having a generally uniform cross-section least substantially the same shape as thenozzle opening 32. Theinitial portion 33 is therefore substantially defined by a pair of parallelplanar walls 35. Thisinitial portion 33 is therefore similar to theinitial portion 16 of the arrangement shown inFigures 2a to 3 . One significant difference is that thedelivery passage 31 includes a wedge shapedportion 34 extending from theinitial portion 33 thereof, the wedge shapedportion 34 havingplanar walls 36 inclined relative to the parallelplanar walls 35 of theinitial portion 33. The inclinedplanar walls 36 extend outwardly from theinitial portion 33 to substantially define the wedge shapedportion 34 of thedelivery passage 31. Eachinclined wall 36 may have an inclination angle, preferably equal to or less than 13°, relative to theplanar wall 35 of theinitial portion 33 to which theinclined wall 36 extends. The abovenoted inclination angle helps to minimise turbulence or facilitate laminar flow in the liquid flow though thedelivery passage 31. - Because of the inclination of the
inclined walls 36, theupstream opening 38 of thenozzle body 30 has a lateral thickness TN greater than the lateral thickness T of thenozzle opening 32. The elongate length LN of theupstream opening 38 may be at least substantially equal to the elongate length L of thenozzle opening 32. In an alternative possible configuration, thedelivery passage 31 may gradually widen, at least from theinitial portion 33 thereof such that the elongate length TN of theupstream opening 38 is greater than the elongate length T of thenozzle opening 32. -
- H is the length of the initial portion of the delivery passage immediately upstream from the nozzle opening of the nozzle body; and
- T is the lateral thickness of the nozzle opening of the nozzle body.
-
-
Figure 6a is similar toFigure 1 , and corresponding integers are conveniently designated with the same reference numerals. The main difference is that thenozzle assembly 1 is shown with thenozzle body 30 ofFigures 5a to c. Thisnozzle body 30 has a generally slot shapedupstream opening 38, while theinner bore 11 of thesupply line 9 supplying ultra high pressure liquid to theupstream opening 38 is typically circular in cross-section. This will result in substantial turbulence being generated within the fluid immediately upstream of thenozzle body 30 resulting in a loss in fluid pressure. It is therefore advantageous to include means to reduce or eliminate this turbulence. Referring in particular toFigure 6b , aflow inset 39 may be located within the inner bore 11 of thesupply line 9 immediately upstream of thenozzle body 30. Theflow insert 39 has a slot shapedinsert passage 41 extending therethrough. The use of such aninsert 39 will help to smooth the fluid flow to theupstream opening 38 of thenozzle body 30. It is to be appreciated that such aflow insert 39 could also be used for, for example, thenozzle body 21 ofFigures 4a and b. -
- LN is the elongate length of the nozzle body upstream opening;
- LN-1 is the elongate length of the lateral cross-section of the insert passage;
- TN is the lateral width of the nozzle body upstream opening; and
- TN-1 is the lateral width of the lateral cross-section of the insert passage.
- Referring the
Figures 7a and 7b , there is shown anozzle body 50 according to yet another alternative arrangement according to the present invention. Thenozzle body 50 is formed in twonozzle body sections 51, the "split"of thenozzle body 50 being in a plane extending through the length of thedelivery passage 54 and bisecting the slot opening (not shown) of thenozzle body 50. In eachnozzle body section 51 there is provided achannel 53. When thenozzle section 51 are assembled together, thechannels 53 together form at least part of thedelivery passage 54 of thenozzle body 50. - In the illustrated arrangement, the
delivery passage 54 is similar in shape to the embodiment shown inFigures 5a to 5c in having a wedge shape portion adjacent the upstream opening of thenozzle body 50. One ormore spacer element 62 are provided between eachnozzle body section 51, thenozzle body section 51 being secured together by fasteningmembers 52. The thickness of the spacer element (s) 62 determines the lateral thickness of the slot opening of thenozzle body 50. This arrangement therefore allows for the lateral thickness of the slot opening to be adjusted by using spacer elements of different thickness or sandwiching more than one spacer element at a time between thenozzle body sections 51. At least onespacer element 62 can be provided between thenozzle body section 51. Alternatively, more than onespacer element 62 can be located between thenozzle body section 51 as required. - The
nozzle body 50 is supported in anozzle mount 55 such as that shown inFigures 8a and 8b . Thisnozzle mount 55 includes acavity 56 in which thenozzle body 50 can be placed. Thecavity 56 has aninner face 59 in which is provided aslot opening 58. This nozzlemount slot opening 58 is aligned with the slot opening of thenozzle opening 50 when supported therein. An "O"ring 57 is located between alower end face 60 of thenozzle body 50 and theinner face 59 of thenozzle mount cavity 56. - This arrangement allows high pressure liquid to circulate around the
nozzle body 50, with theend face 60 pressed against theinner face 59. This ensures that the only high pressure liquid passing through thenozzle opening 58 of thenozzle mount 55 is from thedelivery passage 54 of thenozzle body 50. High pressure liquid is prevented from entering the nozzle mount slot opening 58 from the area surrounding thenozzle body 50. This arrangement helps to substantially balance the liquid pressure between the exterior of thenozzle body 50 and thedelivery passage 54 thereof to minimise thepossibility of the "bursting"of thenozzle body 50 that could occur if there is a substantial difference between the pressure within thedelivery passage 54 and the exterior of thenozzle body 50. - The nozzle body arrangement shown in
Figure 7a and 7b is relatively straight forward to manufacture because thedelivery passage 54 is in part provided bychannels 53 machined in thecontact face 61 of eachnozzle section 51. Furthermore, thenozzle body 50 can be readily "reconditioned" after extended use where there has been wear of the nozzle opening thereof, by "lapping" thecontact face 61 and end face 60 of eachnozzle body section 51. - The
nozzle body - A comparison of the cut made by a conventional UHPL nozzle (
Figure 9a ) and an UHPL nozzle according to the present invention (Figure 9b ) shows the greater area of the cut provided by the latter nozzle. - The
nozzle body 70 shown inFigures 10a and 10b is similar to the embodiment shown inFigures 7a and 7b in being formed in two separatenozzle body sections 71, one of which is shown inFigure 10b . The principal difference is that eachnozzle body section 71 includes abase portion 72 formed of wear-resistant material such as sapphire or diamond ceramic compounds. Thebase portion 72 when thenozzle body 70 is assembled defines the initial slotted shaped portions of thedelivery passage 73. The rest of thenozzle body section 71 provide the wedge shapedportion 74 defined byinclined walls 75 provided in eachnozzle body section 71. The use of wear-resistant base portion 72 help to improve the long term accuracy and reliability of thenozzle body 70. It is however also possible to provide a "land 76" with thebase portion 72 for eachnozzle body section 71, thisland 76 being provided adjacent the shallow end of theinclined wall 75. The land can for example extend in the range of between 0 to 3 mm generally laterally from the end of theinclined wall 75. It has been found that the provision of aland 76 on either side of the initial portion of thedelivery passage 73 provides a zone of slow moving liquid immediately adjacent theband 76. This zone acts to direct the remaining liquid through thedelivery passage 73 to provide a smooth transition to the flow to the slot shaped portion of thedelivery passage 73. The result is a fluid flow which approximates laminar flow. - In the above embodiment, we have described the nozzle system according to the present application with respect to reclamation applications where pressures from 5000 to 30,000 KPa can be used. It should be noted that the nozzle according to the present invention also be used for cleaning applications. The nozzle can be used directed to provide a planar liquid jet for cleaning. In such applications, the liquid pressure can be up to 20,000 KPa.
- It is also possible to use the nozzle system according to the present invention in liquid abrasive cleaning applications as part of a
system 80 as shown inFigures 11a and 11b . The liquidabrasive cleaning system 80 includes thenozzle body 70 as shown inFigures 10a and 10b . It should be noted that other nozzle body embodiments could also be used in the applications. Thesystem 80 further includes a mixingchamber 81 having an elongateinterior cavity 83. Aselongate inlet opening 82 is provided along the length of thecavity 83, this inlet opening 82 being aligned with the slot shaped nozzle opening 77 of thenozzle body 70.Supply openings 84 for supplying abrasive material to thecavity 83 are also provided along either side thereof. - A focusing
conduit 85 extends from the mixingchamber 81 and directs the liquid jet when mixed with abrasive material through to the area to be cleaned. The focussingconduit 85 can have a focusingpassage 86 with a slot shaped lateral cross-section to accommodate the planar liquid jet. - During operation of the liquid
abrasive cleaning system 80, the liquid jet from thenozzle body 70 passes through thecavity 83 of the mixingchamber 81. Abrasive material such as garnet sand or alumina powder are supplied through thesupply openings 84, this material being drawn into thecavity 83 by the Venturi effect arising from the passage of the liquid jet through the mixingchamber 83. The abrasive material therefore "coats" the liquid jet when passing through the mixing chamber. The focusingconduit 85 then acts to direct the liquid jet to the area to be abrasively cleaned. - In such applications, the liquid pressure supplied to the
nozzle body 70 can be in the order of between 10,000 to 20,000 KPa. This range falls between the pressure range used for cutting applications, and the pressure range used for direct liquid cleaning by the nozzle according to the present invention. It should however be noted that the invention is not necessarily restricted to use within these ranges for each application. - Although this invention has been described by way of an example with reference to possible arrangements thereof, it is to be understood that modifications or improvements may be made thereto without departing from the scope of the invention. For example, in the abovedescribed arrangements, at least a portion of the delivery passage is defined by parallel planar walls. It is however also envisaged that the delivery passage may be defined by inclined planar or curved walls extending all the way from the upstream opening to the nozzle opening of the nozzle body with no parallel portions thereof. The delivery passage would therefore be wedged shaped or a flattened cone shape without any initial parallel portion. Furthermore, in the abovedescribed arrangements, the nozzle opening is shown flush with the end face of the nozzle body. It is however also envisaged that the nozzle opening be provided by a "throat" within the delivery passage, the throat being recessed inwardly from the end face of the nozzle body. The delivery passage can therefore narrow progressively to the throat providing the nozzle opening, and may then expand outwardly again in a similar fashion to a Venturi. The throat will still however retain the slot shape according to the present invention.
Claims (34)
- A nozzle system for delivering a high or ultra high pressure liquid, the nozzle system including a nozzle mount (55) and a nozzle body (50, 70), the nozzle body (50, 70) having a delivery passage (54, 73) passing therethrough to a nozzle opening at an end face (60) of the nozzle body (50, 70), wherein the nozzle opening is slot shaped to thereby deliver a relatively planar shaped high or ultra high pressure liquid jet therefrom, characterised by the nozzle mount (55) having a cavity (56) in which the nozzle body (50) is located, wherein high or ultra high pressure liquid can circulate around the exterior of the nozzle body (50).
- A nozzle system according to claim 1 wherein the nozzle mount (55) has an inner face (59) with a discharge opening (58) therein, the nozzle body (50) being receivable in the cavity (56) with the nozzle end face (60) in sealing engagement the mount inner face (59) and the nozzle opening in alignment with the discharge opening (58) whereby a liquid jet issuing from the nozzle opening can discharge through the discharge opening (58) and whereby sealing engagement between the nozzle end face (60) and the mount inner face (59) establishes a liquid seal therebetween surrounding the aligned nozzle opening and discharge opening (58).
- A nozzle system according to claim 2 wherein said sealing engagement is established by an annular seal 57 disposed about the aligned openings and between the nozzle end face (60) and mount inner face (59).
- A nozzle system according to claim 3 wherein the annular seal (57) comprises an O-ring (7).
- A nozzle system as claimed in any one of the preceding claims wherein at least an initial portion (16, 33) of the delivery passage (5, 23, 31, 54, 73) immediately upstream from the nozzle opening (7, 25, 32) has a lateral cross-section at least substantially the same as the shape of the nozzle opening.
- A nozzle system as claimed in claim 5 wherein said initial portion (16, 33) of the delivery passage (5, 23, 31, 54, 73) is defined between two opposed planar surfaces (17, 35) in spaced apart relationship.
- A nozzle system as claimed in claim 5 or 6 wherein the delivery passage (23) has an upstream opening (27) and the delivery passage (23) has a uniform lateral cross-section from the upstream opening (27) to the nozzle opening (25), the uniform lateral cross-section being at least substantially the same shape as the nozzle opening (27).
- A nozzle system as claimed in claim 5 or 6 wherein the delivery passage (5, 31, 54, 73) has an upstream opening (15, 38), and includes a further portion (18, 34) between the upstream opening (15, 38) and the initial portion (16, 33) thereof, wherein the further portion (18, 34) of the delivery passage (5) has walls (19) diverging outwardly from the initial portion (16, 33) thereof.
- A nozzle system as claimed in claim 9 wherein the further portion (34) of the delivery passage is wedge shaped.
- A nozzle system as claimed in claim 9 wherein the further portion (18) extends outwardly from a slot shaped end to a circular said upstream opening (15).
- A nozzle as claimed in any one of claims 9 to 11 wherein:
where:H is the length of the initial portion (16, 33) of the delivery passage (5, 31) immediately upstream from the nozzle opening (7, 32) of the nozzle body (3, 30); andT is the lateral thickness of the nozzle opening (7,32) of the nozzle body (3, 31). - A nozzle system as claimed in any one of claims 9 to 13 wherein the lateral cross-section of the delivery passage (5, 31, 54, 73) maintains an elongate length at least substantially the same as the elongate length of the nozzle opening (7, 32) from the upstream opening (15, 38) to the nozzle opening (7, 32).
- A nozzle system as claimed in any one of claims 9 to 13 wherein the lateral cross-section of the delivery passage (5, 31, 54, 73) maintains an elongate length at least substantially the same as the elongate length of the nozzle opening (7, 32) for the initial portion (16, 33) of the delivery passage (5, 31, 54, 73) and the elongate length lateral cross-section of the delivery passage is equal to or greater than the elongate length of the nozzle opening (7, 32) and the further portion (18, 34) of the delivery passage (5, 31, 54, 73).
- A nozzle system as claimed in any one of claims 9 to 15 wherein the angle of inclination of the walls (36) of the further portion (34) of the delivery passage (31) is equal to or less than 13° relative to the walls (35) of the initial portion (33) of the delivery passage (31).
- A nozzle system according to any one of the preceding claims including a supply line (9) for supplying high or ultra high pressure liquid to the nozzle body (3, 21, 30, 50, 70), the supply line having an inner bore (11) with a lateral cross-section having dimensions which are greater than or equal to the length and width of the nozzle opening (7, 25, 32).
- A nozzle system according to claim 17 further including flow straightening means provided immediately upstream of the nozzle body (3, 21, 30, 50, 70) within the inner bore (11) of the supply line (9).
- A nozzle system according to claim 17 or 18 including a flow insert (39) located within the inner bore (11) of the supply line (9), the flow insert (35) having an insert passage (41) extending therethrough.
- A nozzle system as claimed in claim 19 wherein the insert passage (41) has a lateral cross-section having a shape corresponding to the shape of the upstream opening (38) of the nozzle body (30).
- A nozzle system as claimed in claim 20 wherein:
where:LN is the elongate length of the nozzle body upstream opening (38);LN-1 is the elongate length of the lateral cross-section of the insert passage (41);TN is the lateral width of the nozzle body upstream opening (38); andTN-1 is the lateral width of the lateral cross-section of the insert passage (41). - A nozzle system as claimed in any one of the preceding claims wherein the nozzle body (50, 70) is formed from two nozzle body sections (51, 71), the nozzle body (50, 70) being split in a plane extending through the length of the delivery passage (54, 73) and bisecting the slot opening.
- A nozzle system as claimed in claim 22 including at least one spacer element (62) located between the two nozzle body sections (51, 71) for defining the lateral thickness of the slot opening.
- A nozzle system as claimed in claim 22 or 23 wherein each nozzle body section (71) includes a further separate base portion (72) formed of wear resistant material, the base portions (72), defining the nozzle opening of the nozzle body (70) when the two sections (71) are brought together.
- A nozzle system as claimed in claim 24 wherein one of or each base portion (72) provides a land (76) extending into and providing a step between the further portion and the initial portion of the delivery passage.
- A method is disintegrating material including exposing the material to a high or ultra high pressure liquid jet generated by a nozzle system according to any one of the preceding claims.
- A method of disintegrating material including exposing the material to at least one high or ultra high pressure liquid jet to thereby disintegrate the material, the jet being provided by a high or ultra high pressure liquid nozzle system according to any one of the claims 1 to 25.
- A method according to claim 27 including exposing the material to a plurality of said liquid jets.
- A method of cleaning including exposing an area to be cleaned to a high or ultra high pressure liquid jet generated by a nozzle system according to any one of claims 1 to 25.
- A liquid abrasive cleaning system (80) including:a nozzle system according to any one of claims 1 to 25;a mixing chamber (81) located downstream of the nozzle opening (77) through which the liquid jet is directed by the nozzle system, the mixing chamber (81) including supply means for supplying an abrasive material to the mixing chamber (81) for mixing with the liquid jet; anda focusing conduit (85) extending from the mixing chamber (81) for directing the liquid jet mixed with abrasive material to an area to be cleaned.
- A system as claimed in claim 30 wherein the mixing chamber (81) includes an elongate interior cavity (83) for accommodating the liquid jet, and the supply means includes at least one supply opening (84) located along at least one side of the elongate cavity (83) through which the abrasive material is supplied.
- A system as claimed in claim 31 wherein supply openings (84) are provided on both sides of the elongate cavity (83) of the mixing chamber (81).
- A system as claimed in any one of claims 30 to 32 wherein the focusing conduit (85) has a focusing passage (86) passing therethrough, the focusing passage (86) having a slot shaped lateral cross-section.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPP8609A AUPP860999A0 (en) | 1999-02-10 | 1999-02-10 | Ultra high pressure liquid jet nozzle |
AUPP860999 | 1999-02-10 | ||
PCT/AU2000/000087 WO2000047330A1 (en) | 1999-02-10 | 2000-02-10 | Ultra high pressure liquid jet nozzle |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1165243A1 EP1165243A1 (en) | 2002-01-02 |
EP1165243A4 EP1165243A4 (en) | 2005-04-27 |
EP1165243B1 true EP1165243B1 (en) | 2008-08-06 |
Family
ID=3812810
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20000904713 Expired - Lifetime EP1165243B1 (en) | 1999-02-10 | 2000-02-10 | Ultra high pressure liquid jet nozzle |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1165243B1 (en) |
JP (1) | JP4638047B2 (en) |
AT (1) | ATE403499T1 (en) |
AU (4) | AUPP860999A0 (en) |
DE (1) | DE60039755D1 (en) |
WO (1) | WO2000047330A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7185833B2 (en) | 2004-03-18 | 2007-03-06 | Ernest Geskin | Method for fluid jet formation and apparatus for the same |
JP4439971B2 (en) * | 2004-03-31 | 2010-03-24 | 全郎 妹尾 | Water purification equipment |
JP4587779B2 (en) * | 2004-11-01 | 2010-11-24 | 株式会社いけうち | One-fluid nozzle for stick flow injection |
IT1397651B1 (en) * | 2010-01-15 | 2013-01-18 | Bortolussi | PROCEDURE FOR THE DISGREGATION OF WASTE MADE OF COMPOSITE MATERIALS BY PLANED FLUID JETS IN ORDER TO SEPARATE AND RECOVER THE CONSTITUENT MATERIALS OF THESE COMPOSITE MATERIALS, AND ITS APPARATUS FOR ITS REALIZATION. |
EP3320865B1 (en) * | 2016-11-09 | 2020-08-19 | Medaxis Ag | Handpiece for spraying a fluidjet and insert piece for this hand piece |
US11174609B2 (en) * | 2018-09-17 | 2021-11-16 | Hypertherm, Inc. | Mobile waterjet rail repair system |
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US2814471A (en) * | 1954-05-24 | 1957-11-26 | Techkote Company Inc | Mixing and metering valve assembly |
US3032275A (en) * | 1960-11-10 | 1962-05-01 | Zing Corp | Spray device |
US4347805A (en) * | 1976-05-12 | 1982-09-07 | National Steel Corporation | Apparatus for liquid coating thickness control |
JPS5684055U (en) * | 1979-11-30 | 1981-07-07 | ||
JPS57140859U (en) * | 1981-02-27 | 1982-09-03 | ||
FR2523019B1 (en) * | 1982-03-15 | 1985-11-08 | Commissariat Energie Atomique | FLAT JET SANDBLASTING NOZZLE CONTAINING SOLID ABRASIVE PARTICLES, AND METHOD FOR IMPLEMENTING A SANDBLASTING NOZZLE FOR RADIOACTIVE DECONTAMINATION |
US4789104A (en) * | 1987-02-24 | 1988-12-06 | Specialty Manufacturing Co. | High pressure coaxial flow nozzles |
JPH0259268A (en) * | 1988-08-25 | 1990-02-28 | Kenzo Hoshino | Abrasive jet method |
JPH03111172A (en) * | 1989-09-21 | 1991-05-10 | Taisei Corp | Cutting jig for abrasive water jet |
EP0591266B1 (en) * | 1991-06-13 | 1998-09-02 | Southern Rubber Pty Ltd | Method of reclaiming rubber from vehicle tyres |
DE4120613A1 (en) * | 1991-06-20 | 1992-03-05 | Suesse Harald | High pressure water jet for cleaning rock or other materials - has composite nozzle with centre cone and mixing chamber supplied with air and water |
GB2258416B (en) * | 1991-07-27 | 1995-04-19 | Brian David Dale | Nozzle for abrasive cleaning or cutting |
US5170946A (en) * | 1991-08-22 | 1992-12-15 | Rankin George J | Shaped nozzle for high velocity fluid flow |
JP3609109B2 (en) * | 1992-12-08 | 2005-01-12 | フロー インターナショナル コーポレイション | Super high pressure fan jet nozzle |
JPH06178953A (en) * | 1992-12-14 | 1994-06-28 | Daikin Ind Ltd | Super high pressure water jet nozzle |
JPH06198636A (en) * | 1993-01-06 | 1994-07-19 | Sugino Mach Ltd | Surface processing device of stone |
DE4303762A1 (en) * | 1993-02-09 | 1994-08-11 | Kaercher Gmbh & Co Alfred | Flat jet nozzle for a high pressure cleaning device |
FR2712826A1 (en) * | 1993-11-26 | 1995-06-02 | Ind Centre | Surface treatment nozzle, and surface treatment method using such a nozzle. |
AUPM750694A0 (en) * | 1994-08-16 | 1994-09-08 | Cmht Technology (Australia) Pty Ltd | Improvements relating to reclaiming tread rubber from vehicle tyres |
JPH08132399A (en) * | 1994-11-04 | 1996-05-28 | Canon Inc | Water jet nozzle for fine boring |
US5626508A (en) * | 1995-04-20 | 1997-05-06 | Aqua-Dyne, Inc. | Focusing nozzle |
DE19541174C2 (en) * | 1995-11-04 | 1998-11-26 | Spraying Systems Deutschland G | High performance jet nozzle |
US5785582A (en) * | 1995-12-22 | 1998-07-28 | Flow International Corporation | Split abrasive fluid jet mixing tube and system |
JPH10156723A (en) * | 1996-12-02 | 1998-06-16 | Ebara Corp | Machining device using high pressure water jet |
JPH10166240A (en) * | 1996-12-11 | 1998-06-23 | Hitachi Seiki Co Ltd | Injection nozzle of machine tool |
-
1999
- 1999-02-10 AU AUPP8609A patent/AUPP860999A0/en not_active Abandoned
-
2000
- 2000-02-10 EP EP20000904713 patent/EP1165243B1/en not_active Expired - Lifetime
- 2000-02-10 JP JP2000598276A patent/JP4638047B2/en not_active Expired - Fee Related
- 2000-02-10 AU AU26496/00A patent/AU2649600A/en not_active Abandoned
- 2000-02-10 DE DE60039755T patent/DE60039755D1/en not_active Expired - Lifetime
- 2000-02-10 WO PCT/AU2000/000087 patent/WO2000047330A1/en active IP Right Grant
- 2000-02-10 AT AT00904713T patent/ATE403499T1/en not_active IP Right Cessation
-
2004
- 2004-11-15 AU AU2004229075A patent/AU2004229075A1/en not_active Abandoned
-
2009
- 2009-07-21 AU AU2009202934A patent/AU2009202934B2/en not_active Ceased
Also Published As
Publication number | Publication date |
---|---|
JP4638047B2 (en) | 2011-02-23 |
AU2009202934A1 (en) | 2009-08-06 |
AU2004229075A1 (en) | 2004-12-09 |
EP1165243A4 (en) | 2005-04-27 |
JP2002536170A (en) | 2002-10-29 |
ATE403499T1 (en) | 2008-08-15 |
AU2649600A (en) | 2000-08-29 |
AU2009202934B2 (en) | 2012-05-17 |
DE60039755D1 (en) | 2008-09-18 |
AUPP860999A0 (en) | 1999-03-04 |
EP1165243A1 (en) | 2002-01-02 |
WO2000047330A1 (en) | 2000-08-17 |
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